Based on the information available, the boat ramp named Clayton-Judson Road in Summers County, West Virginia is a public boat ramp. It appears to be a single-lane ramp with a concrete surface. The ramp is reportedly 12 feet wide.

The boat ramp services the Greenbrier River, a popular destination for recreational boating and fishing. The Greenbrier River is approximately 173 miles long, and is known for its scenic beauty and abundant smallmouth bass population.

As for the types of watercraft permitted on the river, it appears that motorized boats are allowed, as well as canoes, kayaks, and other non-motorized vessels. However, it's important to note that specific regulations may vary depending on the location and time of year. Anyone planning to use the Clayton-Judson Road boat ramp (or any other boat ramp in West Virginia) should check with local authorities and review current regulations before hitting the water.